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The current HiScroll series from Pfeiffer Vacuum in Asslar, Germany, consists of three dry, hermetically sealed scroll pumps with a nominal pumping speed of six to 20 cubic metres per hour. According to the manufacturer, these vacuum pumps are characterised by high performance when evacuating against atmosphere and very high energy efficiency to reduce the CO2 footprint. In the run-up to HANNOVER MESSE 2023, Pfeiffer Vacuum has now unveiled the new AccessLink intelligent accessory interface, which is designed to enable the use of a wide range of optional accessories. Unlike before, when accessories had to be configured manually, they are now automatically recognised by the HiScroll electronics. The uniform accessory interface is intended to provide noticeably more convenience and safety in operation in the future.

Possibility for optional expansion

The individual process requirements are detected fully automatically by a new gas ballast valve. In this process, the vacuum pump controls the valve either over a specific time interval or depending on the inlet pressure in combination with another accessory, the RPT 010 sensor, which is exclusively available from Pfeiffer Vacuum and integrated into the HiScroll. The automatic gas ballast valve can also be switched manually by a higher-level control system connected to the HiScroll or by the Pfeiffer Vacuum OmniControl.

New vacuum safety valves do a good job

The new vacuum safety valves are responsible for the increased operating safety. The valves prevent a pressure increase at the vacuum flange when the pump is switched off. This significantly increases operational safety, especially in the event of power failures. Any backflow into the vacuum chamber, even in the form of residual gas present in the pump system, is thus prevented. In addition, delayed opening during start-up of the HiScroll prevents a pressure surge toward the vacuum side, which is particularly advantageous for high vacuum systems in connection with the operation of turbomolecular pumps, such as the Pfeiffer Vacuum HiPace.

Designed for long, low-maintenance and sustainable operation.

The optionally integrated measuring tube RPT 010 mentioned above takes over the fully automatic pressure control of the pump. According to the manufacturer, this minimises wear, extends maintenance cycles and reduces the power consumption as well as the CO2 footprint of the HiScroll. Fabian Böcher, Product Manager at Pfeiffer Vacuum, states: "The proven Pfeiffer Vacuum quality, together with the new accessories, ensures a long service life as well as lower operating costs and environmental impact. The easy maintenance of the pumps not only results in short service times, but also in the highest possible availability. The safety valve built into the pump system at the outlet and the self-regulating operation of the pump ensure safe use."